Architecture 975• slip-buffering receive messages• support of National and International bits in timeslot 0• clock controller daughterboard• D-channel interface daughterboard• downloadable D-channel handler daughterboard• 32 software-selectable Tx and Rx Pad values• conversion of PCM commanding Laws (A-A, u-u, A-u, u-A)• Card-LAN for maintenance communicationsArchitecture The main functional blocks of the NTBK50 architecture are:• DS-30X interface• A07 signaling interface• digital pad• carrier interface• CEPT transceiver• SLIP control• D-channel support interface• clock controller interface• Card-LAN / echo / test port interface• 80C51FA MicrocontrollerThe main functional blocks of the NTBK50 architecture include:• DS-30X interface• A07 signaling interface• digital pad• carrier interface• CEPT transceiver• SLIP control• D-channel support interface• clock controller interface• Card-LAN / echo / test port interface• 80C51FA MicrocontrollerNortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
